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Details, datasheet, quote on part number:SN74AS880
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Datasheet text preview:
SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880 DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
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3-State Buffer-Type Outputs Drive Bus Lines Directly Bus-Structured Pinout 'ALS873B is Alternative Version With Noninverting Outputs Package Options Include Plastic Small Outline Packages, Both Plastic and Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs Dependable Texas Instruments Quality and Reliability
SN54ALS880A, SN54AS880 . . . JT PACKAGE SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE (TOP VIEW)
description
These dual 4-bit registers feature 3-state outputs designed specifically for bus driving. This makes these devices particularly suitable for implementing buffer registers, I/O ports, bidirectional bus drivers, and working registers. The dual 4-bit latches are transparent D-type. When the latch enable input (1C or 2C) is high, the Q outputs will follow the data (D) inputs in inverted form, according to the function table. When the latch enable input is taken low, the outputs will be latched. When PRE goes low, the Q outputs go low independently of the clock. The outputs are in a high-impedance state when OC (output control) is at a high logic level. The SN54ALS880A and SN54AS880 are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS880A and SN74AS880 are characterized for operation from 0°C to 70°C.
FUNCTION TABLE (each latch) INPUTS OC L L L L H PRE L H H H X C X H H L X D X H L X X OUTPUT Q L L H Q0 Z
1PRE 1OC 1D1 1D2 1D3 1D4 2D1 2D2 2D3 2D4 2OC GND
1 2 3 4 5 6 7 8 9 10 11 12
24 23 22 21 20 19 18 17 16 15 14 13
VC C 1C 1Q1 1Q2 1Q3 1Q4 2Q1 2Q2 2Q3 2Q4 2C 2PRE
SN54ALS880A, SN54AS880 . . . JT PACKAGE SN74ALS880A, SN74AS880 . . . DW OR NT PACKAGE (TOP VIEW)
1D1 1OC 1PRE NC VCC 1C 1Q1 1D2 1D3 1D4 NC 2D1 2D2 2D3
5 6 7 8 9 10 4 3 2 1 28 27 26 25 24 23 22 21 20 11 19 12 13 14 15 16 17 18
1Q2 1Q3 1Q4 NC 2Q1 2Q2 2Q3
NC No internal connection
PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
2D4 2OC GND NC 2PRE 2C 2Q4
Copyright © 1986, Texas Instruments Incorporated
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SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880 DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
logic symbol
2 1OC 23 1C 1 1PRE 3 1D1 4 1D2 5 1D3 6 1D4 11 2OC 14 2C 13 2PRE 7 2D1 8 2D2 9 2D3 10 2D4 EN C1 S 1D 22 21 20 19 1Q1 1Q2 1Q3 1Q4
EN C1 S 1D 18 17 16 15 2Q1 2Q2 2Q3 2Q4
This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12. Pin numbers shown are for DW, JT, and NT packages.
logic diagram (each quad latch, positive logic)
OC C PRE S C1 1D S D2 C1 1D S D3 C1 1D Q3 Q2 Q1
D1
S D4 C1 1D Q4
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POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
SN54ALS880A, SN54AS880, SN74ALS880A, SN74AS880 DUAL 4-BIT D-TYPE LATCHES WITH 3-STATE OUTPUTS
SDAS079A D2661, DECEMBER 1982 REVISED MAY 1986
absolute maximum ratings over operating free-air temperature range (unless otherwise noted)
Supply voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Input voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 V Voltage applied to a disabled 3-state output . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5.5 V Operating free-air temperature range: SN54ALS880A, SN54AS880 . . . . . . . . . . . . . . . . . 55°C to 125°C SN74ALS880A, SN74AS880 . . . . . . . . . . . . . . . . . . . . . 0°C to 70°C Storage temperature range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65°C to 150°C
recommended operating conditions
SN54ALS880A MIN VCC VIH VIL IOH IOL tw tsu th TA Supply voltage High-level input voltage Low-level input voltage High-level output current Low-level output current Pulse duration duration Setup time, data before C Hold time, data after C Operating free-air temperature PRE low C high 15 15 10 10 55 125 4.5 2 0.7 1 12 15 15 10 10 0 70 ns ns °C NOM 5 MAX 5.5 SN74ALS880A MIN 4.5 2 0.8 2.6 24 NOM 5 MAX 5.5 UNIT V V V mA mA ns
electrical characteristics over recommended operating free-air temperature range (unless otherwise noted)
PARAMETER VIK VOH TEST CONDITIONS CONDITIONS VCC = 4.5 V, VCC = 4.5 V to 5.5 V, VCC = 4.5 V, VCC = 4.5 V, VCC = 4.5 V, VCC = 4.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V, VCC = 5.5 V II = 18 mA IOH = 0.4 mA IOH = 1 mA IOH = 2.6 mA IOL = 12 mA IOL = 24 mA VO = 2.7 V VO = 0.4 V VI = 7 V VI = 2.7 V VI = 0.4 V VO = 2.25 V Outputs high ICC Outputs low 30 14 19 MIN SN54ALS880A TYP MAX 1.2 VCC 2 2.4 VCC 2 3.3 2.4 0.25 0.4 20 20 0.1 20 0.2 112 21 29 30 14 19 3.2 0.25 0.35 0.4 0.5 20 20 0.1 20 0.2 112 21 29 mA V µA µA mA µA mA mA V MIN SN74ALS880A TYP MAX 1.2 UNIT V
VOL IOZH IOZL II IIH IIL IO
Outputs disabled 20 31 20 31 All typical values are at VCC = 5 V, TA = 25°C. The output conditions have been chosen to produce a current that closely approximates one half of the true short-circuit output current, IOS.
POST OFFICE BOX 655303
· DALLAS, TEXAS 75265
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